There was a big avalanche that I heard from No Thorofare Bay. My guess is that it was the one seen here on the ridge between Verstovia and Arrowhead Peak.
It seemed to me like this was a pretty big avalanche.
It's hard to say for sure, but I think the snow depth where it cut loose was probably at least 10 feet deep.
This is the ridge between Verstovia and Arrowhead Peak (map version).